Friedrich wolter



2 Sheets-Sheet 1.

(No Model.)

P. WOLTER. EXTENSION TABLE.

Patented May 2, 1893.

28heets-Sheet 2.

Patented May 2, 1893.

F. WOLTER. EXTENSION TABLE.

Fi gfi.

(No Model.)

ms' ncnms vz'rzns co, wnoroumq, WASNINGYON, u. c.

UNITED STATES PATENT OFFICE.

FRIEDRICH WOLTER, OF HELMSTED'I, GERMANY.

EXTENSION-TABLE.

SPECIFICATION forming part of Letters Patent No. 496,588, dated May 2, 1893. Application filed Novemher22, 1892. Serial No. 452,831. (No model.) Patented in Germany October 4, 1889 No. 54,653- v To all whom it may concern.-

Be it known that I, FRIEDRICH WOLTER, a subject of the Emperor of Germany, residing at Helmstedt, in the Duchy of Brunswick, Germany, have invented certain new and useful Improvements in Sliding Tables; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which .it appertains to make and use the same.

are disengaged by the weight of the respective plate, when drawn out. Hinged supplementary legs, secured to one plate, serve to support the same in extended position, by falling automatically under the plate; by pushing the table together these legs return automatically into their raised position.

In the accompanying drawings one of my tables is shown, having two extension plates on each side, and Figure 1 shows a vertical longitudinal section, the plates being drawn out at the right hand side, and in position under the main plate at the left. Fig. 2 is the top view on Fig. 1, the plates being taken off, and only indicated in outlines by dotted lines. Fig. 3 is a transverse vertical section 011 the line my Fig. 1. Fig. 4 represents the slides, the plates and legs in the extended position. Fig. 5 is a similar sectional View, the parts being only partly extended. Figs. 6 and -7 represent the coupling hook in two views.

A is the main plate of the table, which is not extensible but can move slightly up and down, being guided by tenons a of its cross bar a (Fig. 1) in holes a (Fig. 2) of the crosspiece 0, being a part of the frame 0 of the table.

A and A are extension plates on both sides; A is connected with the lower slide B by means of a strap, bent of flat iron a (Figs. 6 and 7) and A is secured on slide B by means of screws, nails, glue or in any other Way. The slide B has in the rear an upturned end 1) (Figs. 4 and 5) which abuts against and under the cross-piece 0 when the table is extended, so that the slide is prevented from tilting over. The slide B is provided besides with a cleat b (Fig. 4) passing under a plate of sheet-metal c secured to the cross-rail c of the frame 0, when plate A is drawn out to full extent. To the front end I) of slide B the legs D are hinged at If, carrying the laterally projecting arm (1. The strap a supports the hook c which is pivoted on a pin 0 riveted into said strap, (Fig. 7.) The upper slide B rests on B and is prevented from running out any farther, when plate A is drawn out to full length, by pins 1) (Figs. 4 and 5) projecting laterally from B which engage in notches b of metal-plates b fastened to slide 13 (Fig.4). In this position the ends of slide B are still under the straps a while pins b are in the notches 19 thus B is prevented from tilting. The drawings show that the slides are arranged in an inclined position, and consequently make a rising motion, when they are drawn out. Slide B carries moreover an arm 6 with finger e which abuts against the cross rail (1 of the legs D and maintains'them in vertical position, (Fig. 4.) The strap a is worked out at its top into a flat plate a which is fastened to the edge of plate A by screws, (Fig. 6) the opposite edge of A rests looselyon slide Bin the fully extended position (Fig. 4). I

lathe plate A a small space a is provided in' its rear edge, directly behind the plates a so that hook 0 can enter with its front end, (being heavier than its back end) thus catching behind said plate, (Fig. 7.) The plate A is provided at its outer edge with a handle a or suitable means to be grasped for extending the table. The border of the table a uniting the two slide bars B carries an arm a which strikes against the arm (1 when A is pushed inwardly. When a table should have more than two extension plates, the mechanism of the hook c is to be repeated correspondingly, in order to couple the extension plates with the slides.

The mode of operation of the described table is the following: The handle a of plate A I is taken on a forward pull exerted on the plate, so as to move it outwardly with the slide B. The traction on A will be transferred also on hook 0 being engaged by its heavier end in the plate A which consequently will follow the outward pull, and will draw along the strap a and slide B, being in rigid connection with the same. The inclined position of the slides produces a certain rise of the main table plate A, while the extension is effected. As soon as plate A has passed from under the main plate, the latter is free to descend and falls with its whole weight upon the rear ends of hook 0 so as to disengage its front end from the plate a in the extension plate A and thus liberating the latter. At the same time b has come under 0 (Fig. 4:) thereby arresting the slide B. Now the plate A and slide B alone will be able to move on, and the arms a and at will part from each other, so that the legs are free to go down by their weight and swing around the hinges b into a vertical position. Finally the finger e strikes against the cross rail d of the legs D pressing: it against the cross rail 11 thereby securing their vertical position. At this time the table is drawn out to its full length (Fig. 4) and thepinsb have reached thenotches b thuslilniting anyfurtheroutward pull of the plate A and slide B. The described operation is repeated in the same way at the other end of the table. In order to push the table together again, plate A is pushed inward, after having lifted the outer edge of plate A. The slide B in following the inward motion, strikes with its arm a against the arm 61 of the legs, which have been set free by the back motion of finger e Thelegs are thus swung back on their hinges into horizontal position and maintained in the same as shown on left side of Fig. 1. When A has been fully returned under A, the main plate A is lifted a little and both extension plates with the slides are pushed under it into the original position.

By lifting up the plate A the hook c is allowed to catch again behind the plate a.

I claim- 1. The combination with the frame of a table, of legs hinged thereto, an arm 01 connected to said legs, an arm 0, attached to the outer extension plate and engaging said arm d substantially as and for the purpose set forth.

2. The combination with the frame of a table, of slides B B, plates A A the support a attached to slide B, a hook c mounted on said support, a catch on plate A engaging said hook supporting legs for said plates and means for automatically raising and lowering said legs as the plates are drawn or closed substantially as set forth.

3. The combination with the frame guides and top plates of a table, of legs hinged to said frame an arm 6 attached to one of the top plates, a finger e mounted on said arm, a cross tie d which said finger engages to force said legs intoavertical position an arm a attached to the outer extension plate and an arm 61 mounted 011 cross tie d and engaged by arm a to lift the legs when the plates are being closed substantially as set forth.

4. The combination with the frame and top plates of a table, of slides B B arranged one above the other, a support a attached to the former and guiding the latter slide legs for supporting said top plates and means for automatically raising and lowering said legs as the plates are drawn or closed substantially asset forth.

In testimony whereof Ihavehereuntosigned my name in the presence of two subscribing witnesses.

FRIEDRICH WOLTER.

Witnesses: I

WM. G. SPALDING, R. R. ANDREWS. 

